Substituted bis-indole derivatives useful as contrast agents, pharmaceutical compositions containing them and intermediates for producing them

摘要

Metal-complexable substituted bis-indole derivatives comprising the structure shown in formula (I) hereunder: enantiomers and pharmaceutically acceptable salts thereof and metal complexes thereof, wherein L, R₁, R₂, R₃, C₁, C₂, m, n, p, q and r are as defined in claim 1 for use as constrats agents.